Question

The median of 21 observations is 18 If two observations 15 and 24 are included to the observation then the median of new series is

• A. $15$
• B. $18$
• C. $24$
• D. $16$

Answer 1

The correct option is B $18$

Here, Median of 21 observations is 18.
$\therefore$ Middle most term is 18
Now if 15 and 24 added to the obsevations.
since, 15<18
$\therefore$ 15 is added to the left of 18.
and 24>18
$\therefore$ 24 is added to the right of 18.
$\therefore$ Middle most term is still remains same. i.e. 18
$\therefore$ Median of new series is 18.